- Clark Gable
- Big John McMasters
- Spencer Tracy
- Square John Sand
- Claudette Colbert
- Betsy Bartlett
- Hedy Lamarr
- Karen Vanmeer
- Frank Morgan
- Luther Aldrich
- Lionel Atwill
- Harry Compton
- Chill Wills
- Harmony Jones
- Marion Martin
- Whitey
- Minna Gombell
- Spanish Eva
- Joe Yule
- Ed Murphy
- Horace Murphy
- Tom Murphy
- Roy Gordon
- McCreery
- Richard Lane
- Ass't. District Attorney
- Casey Johnson
- Little Jack
- Baby Quintanilla
- Baby Jack
- George Lessey
- Judge
- Sara Haden
- Miss Barnes
- Frank Orth
- Barber
- Frank McGlynn Sr.
- Deacon
- Curt Bois
- Ferdie
- Walter Bacon
- Townsman
- Barbara Bedford
- Nurse
- Hank Bell
- Hank - Man in Dance Hall
- Charles D. Brown
- U.S. Marshal Stebbins
- Francis X. Bushman Jr.
- Man with Nitroglycerine
- Marietta Canty
- Karen's Maid
- Charles Coleman
- Parker
- James Conaty
- Man Working in McMasters' Office
- Nell Craig
- Compton's Secretary
- Dick Curtis
- Hiring Boss
- Helen Dickson
- Mrs. Summers
- Jimmy Dime
- Townsman
- Ray Dixon
- Townsman
- Eddie Dunn
- Wildcatter
- Franklyn Farnum
- Alarmed Townsman
- Pat Flaherty
- Man at Dice Table
- Bess Flowers
- Worker in McMasters' Office
- Byron Foulger
- Geologist
- Sam Garrett
- Rider / Roper (uncredited)
- George Guhl
- Baggage Man
- Frank Hagney
- Man Abandoned by Whitey
- William Halligan
- McCreery's Associate #2
- John Hamilton
- McMasters' Defense Attorney
- Tom Hanlon
- Racetrack Announcer
- Harry Hayden
- Smith - the Architect
- Holmes Herbert
- Doctor
- Howard Hickman
- McCreery's Associate #1
- Earle Hodgins
- Rodeo Barker
- Shep Houghton
- Saloon Brawler
- Jack Ingram
- Oilman at Producers' Convention
- Sheldon Jett
- Oil Man at Meeting
- Robert Emmett Keane
- Oilman in New York
- Mitchell Lewis
- Venezuelan Foreman
- Tom London
- Sheriff Harris
- Frank McLure
- Man in Hotel Lobby
- Robert Milasch
- Townsman
- Carlotta Monti
- Saloon Hostess
- Philip Morris
- Oil Man
- John T. Murray
- Mr. Springtime
- Richard Neill
- Juror
- Wedgwood Nowell
- Oilman at Producers' Convention
- Ted Oliver
- Man Asking 4 Bits to Cross
- Nestor Paiva
- Venezuelan Officer
- Milton Parsons
- Aldrich's Assistant
- Lee Phelps
- Man Fighting Oil Fire
- Henry Roquemore
- Mr. Summers
- Benny Rubin
- McCreery's Associate #3
- Allen D. Sewall
- Juror
- Cap Somers
- Townsman
- Larry Steers
- Lawyer at Prosecution's Table
- Bert Stevens
- Hotel Lobby Extra
- William Tannen
- Hotel Desk Clerk #1
- Eddy Waller
- Hotel Clerk
- Harry Wilson
- Townsman
- Tom Wilson
- Man in Saloon
- Douglas Wood
- Oil Man at New York Meeting
- Katherine Yorke
- Dance Hall Girl
